Tappet for internal-combustion engines.



G. H. RICH.

TAPPET FORINTERNAL COMBUSTION ENGINES.

APPLlcArxoN man rea. 12. 19H.

1,228,350. Patented4 May 29, 1917.

Illtll TED sTArEs Parla carica.

GEORGE E. 31GB, OF BATTLE CREK, MICHIGAN. ASSIGNOB TO STEEL PRODUCTS Comm, OF BATTLE CREEK, MICHIGAN, A.' CORPORATION OFMICHIGAN.

TALPPET TOR INTERNAL-COMBUSTION ENGNES.

Specication of Letters Patent.

Patented Maj' 29, 1917.

Application led February 12, 1917. a Serial No. 148,272.

To all whom t may concern.'

Be it known that I, GEORGE 1R. RICH, a citizen of the United States, and a resident of Battle Creek, county of Calhoun, and State of Michigan, have invented certain new and useful Improvements, in Tappets for Internal-Combustion Engines, of which the following is declared to be a full, clear, and exact description.

This invention relates to tappets for internal combustion engines, and its primary object is to provide an extremely light but strong, substantiall and efficient tappet. There is a demandvat present for a light tappet for internal combustion engines of the types employed in motor cars, and many efforts have been made to produce a lighttappet which shall possess the above mentioned requirements, but to the best of my knowledge and information, no successful results have been obtained thus far. l have produced a tappet,"the body of which is constructed of one piece, the head being of comparatively heavy formation, and thel stem of very thin, light, tubular formation. The'` connection with the, adjustment bolt or other valveengaging device is secured to the stem by spot welding it thereto. The invention consists in the several novel features herein fully set forth and distinctly pointed out in the claims The invention is clearly illustrated in the accompanying drawing, in which:

Figure 1, is a side elevation of a tappet embodying a simple form of the present invention; Fig. 2, is a vertical section thereof taken on the line 2-2 of Fig. l; Fig. 3, is a side elevation of a tubular, internally screw threaded -plug which forms part of the tappetshown in Figs. 1, and 2; and Fig. 4,' is a central vertical section of a slightly modified form of the invention.

Referring to said drawing, and rstto Figs. 1 to 3, inclusive, which illustrate a simple embodiment of the invention, 10, designates the body portion of the tappet, 11, the adjustment bolt and 12, the jam nut. The body 10, has a tubular'stem portion 13, formed on one end with a disk like head 14, integral therewith. The wall of -open end of the stem and is spot welded thereto as at 18. The shoulder 19, formed between the neck and 4protruding portion of the plug, bears against the extreme end of the stem. i

The plug is bored and tapped for the reception of the adjustmentbolt 11, and the jam nut 12, is placed on the bolt asusual, and screwed down against the plug to lock the bolt in any position of adjustment.

Preferably the body portion 10, is made from a solid piece of steel, bored out to form the tubular stem, and preferably it is casehardened to provide/'the hardhead, in accordance with practice described .in my prior application for patent on tappets, filed September 18, 1916, Serial No. 120,- 7 40, upon which Letters Patent were issued February 6, 1917.

The form of the invention illustrated in Figs. l to 3 inclusive, is intended for use in internal combustion engines where the cam Vshaft is below the valves, and the tappets motors employing .overhead valve mecha-V nism. In this form the plug 15a, is drilled to form a socket 20, which is adapted for the reception of a rod or stem of the valve mechanism. The protruding portion may be cylindrical in form, and its reduced portion 17a, is spot Welded to the tubular stem as in the preferred form.

It is readily apparent that'by making the wall or shell of the stem portion very thin, the weight vof the tappet is reduced materially, thus accomplishing the result ,desired, and that by providing a thicker walled plug, permanently secured to the stem, suitsol saI

able connections with the adjustmenh bolt are obtained.

More or less variation of the exact details of construction is possible without departing from the spirit of this invention; I desire, therefore, not to limit myself'to the exact forms shown and described,l but intend in the following claims to point out all of the invention disclosed herein.

I claim as new and desire to secure by Letters Patent:

l. A tappet for internal combustion engines, comprising a body portion consisting of a single piece having a thin walled tubular stem, formed with a disk like head on one end thicker than the Wall ofjthe stem, and a plug seated on the open end and permanently secured to said stem.

2. A tappet for internal combustion engines, comprisin a one piece body portion consisting of a isk like he'ad ortion, and a tubular stem portion, the Wal of the stem portion being considerably thinner than the head, and a' plug having a portion protruding from the stem, and of the same'external diameter as the stem, and having a reduced portion fitting in said stem and welded thereto.

3. A tappet for -internal combustion engines, comprising a one piece body portion consisting of a disk like vhead portion and a cured thereto, said plug protruding from.

said stem, and the protruding portion being of the same diameter as the stem and having two oppositely disposed flat surfaces adapted to be grasped by a wrench.

4. A tappet for internal combustion engines, comprising a single piece body portion, consisting of a disk like head and a tubular stem, the wall of which is thinner than the head, and an internally screw threaded, tubular plug, seated on the open end of said stem, and havin a reduced portion projecting into the hol ow of the stem and welded thereto, the protruding portion being of the same diameter as the stem, and having two flat faces, adapted to be grasped by a wrench, said plu being arranged to receive and hold an adjustmentrbolt.

5. A tappet for internal combustion engines, comprising 'a single piece, case hardened, body portion, consisting of a disk like head and a tubular stem, the wall of which is thinner than the head, and a plug seated ,on the end of said stem and welded thereto.

GEORGE R. RICH., 

